Improvement in smoke-stack heater-pipes



T. B. mun, S m o k e- S t a c k H o it e r P i p 9 Fate :1 led March 23,187 5.-

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THOMAS B. FIELD, UORNING, NEW YORK.

IMPROVEMENT IN SMOKE-STACK HEATER-PIPES Specification forming part ofLetters Patent No. 161,108, dated March 23, 1875; application filedNovember 7, 1874.

To all whom it may concern:

Bc it known that LTHoMAs B. FIELD, of Corning, in the county of Steubenand State of New York, have invented a new and valuable Improvement inSmoke-Stack Heater-Pipes; and I do hereby declare that the following isa full, clear, and exact description of the construction and operationof the same, reference being had to the annexed drawings, making a partof this specification, and to the letters and figures of referencemarked thereon.

The drawing is a representation of a vertical central section of, myheater.

This invention has relation to means for heating rooms, or thepassenger-coaches of a railroad, by utilizing the heat and products ofcombustion after they have served their original purpose for heating airor water in a chamber situated within the smoke-box of a stationary orlocomotive boiler; and the nature of the invention consists in pipesvertically arranged in the smoke-box of a boiler, and extending to theupper portion of the smokestack, the ends of the said pipes beingconnected by elbows, whereby air or water forced into the saidheating-pipes will be exposed to the intense heat at the lower part ofthe smoke-box in ascending, and again in descending, the pipes therebyobtaining a very great degree of heating power for the contents thereof,as will be hereinafter more fully explained.

The chamber into which the products of combustion enter from theboiler-fines has a temperature much greater than that of thesmoke-stack, and it is the object of my invention to obtain all theadvantage of this increased heat, by arranging the heat-conducting pipesin connected pairs, to make their circuit in the smoke-stack directlywithin the flne chamber, in order that both the induction and eductionbranches of the heat-conducting pipes shall enter and leave theflue-chamber below its hottest portion, and receive thereby the doubleaction of the currents of heat pouring from the boiler-fines, and bythis means obtain a high degree of heat, which is so necessary in itssubsequent passage through exposed pipes to the apartments to be warmed,especially railway-cars.

The state of the art shows that a pipe has been arranged in theflue-chamber entering at the bottom thereof, and passing up in spiralform round the interior of the smokestack of a locomotive, and passingout of the smoke-stack at its base and along the outside of the boilerto the heat-conducting pipes. But it is obvious that under such anarrangement no double action of the heat of the fluechamber can beobtained, and that there is very considerable loss of 'heat in the exitof the conducting-pipe at the base of the smokestack; whereas, by theimprovement claimed herein, the greatest possible heat is obtained bythe smoke-pipe crossing the boiler-flue openings in passing into and outof the smokestack.

In the annexed drawings, A designates a smoke-box, andB the smoke-stack,of a stationary or locomotive boiler, in which only as many pipes O asare necessary to my invention are vertically arranged, as shown in Fig.1, extending from the floor a, of the smoke-box nearly to the top of thestack. These pipes pass through the floor of the smoke-box, and areextended into the apartment or cars which are designed to be heated, andtheir upper ends are connected by a tubular' elbow, D.

The improved heating apparatus thus described is used in the followingmanner: Cold air is forced in a continuous current through the inductionend 0 of these pipes by means of a blower in the apartment, and issubjected to intense heat at the lower part of the said pipes as it isforced upward. In its progress to the upper end of the pipe, it is alsostill further heated by hot air and products of combustion passing outof the smoke-stack to the open air, and, while also acted upon in itsdescent, is raised to a very high temperature by being again passedthrough the currents escaping from the furnace before issuing from thelower end of the said pipe into the apartment.

In this manner, air which has been Withdrawn from the apartment in acold condition is returned highly heated. When water is used forheating, a pump will be employed instead of a blower.

While using a single pair of coupled pipes, as shown in the drawings, Imay in practice employ a greater number when necessary, in which caseeach pair will be connected with the next by an elbow, alternately attop and bottom, forming a continuous connection, through which air andwater will be forced, as above described, and with the same usefulresult. Ishall also, when using water as the heating medium, use acheck-valve, to prevent regurgitation thereof, and a safety-valve, toprevent explosions of the pipes.

What I claim as new, and desire to secure by Letters Patent, is

In a heater in which the waste heat of the smoke box and stack of asteam-boiler is utilized for heating air or water, the pipes 0, combinedtherewith and arranged in pairs, as

described, to enter and leave the smoke-box below the impinging currentsof heat from the furnace, whereby the fluid to be heated is THOMAS B.FIELD.

Witnesses:

J. S. ROBINSON, D. F. BROWN.

